Oksana Shramkova

Effect of Magnetic Bias on Nonlinear Scattering by Stacked Semiconductor Layers

The properties of the three-wave interaction and wave scattering by periodic stacks of nonlinear semiconductor layers with external magnetic bias have been explored, taking into account the nonlinear charge dynamics. It has been shown that the mixing processes in magnetoactive semiconductor structures are enhanced by the magnetic bias and the combinations of layer physical and geometrical parameters. The effects of magnetic bias on nonreciprocity of combinatorial frequency generation are discussed.

Electromagnetic wave propagation in active and passive multilayered nanostructures

The propagation and attenuation of electromagnetic waves in the artificial multilayered periodic nanostructures were investigated in the work. We have studied the dispersion of waves in an infinite fine-stratified semiconductor medium. The influence of dissipation on the instability of drift waves in a fine-layered periodic semiconductor structure subjected to an electric field that induces the drift of charge carriers of different signs has been considered. It was discovered that slow magnetoplasma waves can propagate in periodic semiconductor nanostructures. It was shown that in periodic ferromagnet-semiconductor multilayer composite the left-handed behaviour is possible. The peculiarities of transmission spectra of electromagnetic waves which propagate through a fine-stratified magnetoactive structure have been investigated.

Pulse mixing by Fibonacci and Thue-Morse ordered semiconductor layers

The properties of combinatorial frequency generation by two-tone Gaussian pulses incident at oblique angles on quasiperiodic (Fibonacci and Thue-Morse) stacks of binary semiconductor layers are discussed. The analysis has been performed using the self-consistent model taking into account the nonlinear dynamics of mobile charges in the layers. The effects of the stack arrangements and constituent layer parameters on the combinatorial frequency waveforms are presented for the specific structures of both types.

Effect of magnetic bias on Gaussian pulse scattering by stacked nonlinear semiconductor layers

The nonlinear scattering of pulses by periodic stacks of semiconductor layers with magnetic bias has been studied in the self-consistent problem formulation, taking into account mobility of carriers. The three-wave mixing technique has been applied to the analysis of the waveform evolution in the stacks illuminated by two Gaussian pulses with different central frequencies and lengths. The effects of external magnetic bias, and stack physical and geometrical parameters on the properties of the scattered waveforms are discussed.

Three-wave scattering by finite nonlinear photonic crystal

The combinatorial frequency generation due to the wave scattering by photonic crystal composed of stacked anisotropic layers of nonlinear dielectric is discussed. The three-wave process is analyzed to characterise the nonlinear interactions. The properties of the waves of combinatorial frequency have been examined in dependence of the structure parameters and frequencies and angles of incidence of pump waves. The enhancement of the nonlinear scattering products at Wolf-Bragg resonances has been demonstrated.

Nonlinear wave scattering by layered structures

The effects of resonance scattering in the nonlinear layered structures illuminated by plane waves of two tones are studied. The waves of combinatorial frequency generated in the distributed three-wave mixing processes have been examined and their distinctive properties are discussed. It is shown that the constitutive and geometrical parameters of the anisotropic layer and surrounding media strongly influence the products of the resonance nonlinear scattering. A dramatic enhancement and total suppression of the combinatorial frequency waves has been demonstrated at the high order Wolf-Bragg resonances when satisfy the additional constraints interrelate the layer parameters, and the pump wave incidence angles and frequencies.